well my friend fortunately told me about the magic wand tool and I am relieved

I know of an easy way to do it in photoshop!

Using the magic wand tool tends to leave a small ~3 pixel fuzzyness around the edges, so after using the magic wand tool, I expand my selection by 3 pixels, then use the fill command. Saves me tons of time after I just color in the outline X3

I recently got a crack version actually so i might be coming to you for help ^^